From a19731a7d46bf9d79cd9469221966b4ae14a8403 Mon Sep 17 00:00:00 2001
From: jackfiled <xcrenchangjun@outlook.com>
Date: Mon, 25 Mar 2024 11:03:11 +0800
Subject: [PATCH] 20240325 Finished

---
 src/problem/mod.rs                 |  3 ++-
 src/problem/p518_coin_change_ii.rs | 39 ++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 src/problem/p518_coin_change_ii.rs

diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index 34c570b..e771d8c 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -83,4 +83,5 @@ mod p1969_minimum_non_zero_product_of_the_array_elements;
 mod p2671_frequency_tracker;
 mod p2617_minimum_number_of_visited_cells_in_a_grid;
 mod p2549_count_distinct_numbers_on_board;
-mod p322_coin_change;
\ No newline at end of file
+mod p322_coin_change;
+mod p518_coin_change_ii;
\ No newline at end of file
diff --git a/src/problem/p518_coin_change_ii.rs b/src/problem/p518_coin_change_ii.rs
new file mode 100644
index 0000000..4406e9f
--- /dev/null
+++ b/src/problem/p518_coin_change_ii.rs
@@ -0,0 +1,39 @@
+/**
+ * [518] Coin Change II
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn change(amount: i32, coins: Vec<i32>) -> i32 {
+        let amount = amount as usize;
+
+        let mut dp = vec![0; amount + 1];
+        dp[0] = 1;
+
+        for coin in &coins {
+            let coin = *coin as usize;
+
+            for i in coin..=amount {
+                dp[i] += dp[i - coin];
+            }
+        }
+
+        dp[amount]
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_518() {
+        assert_eq!(4, Solution::change(5, vec![1, 2, 5]));
+        assert_eq!(0, Solution::change(3, vec![2]));
+        assert_eq!(1, Solution::change(10, vec![10]));
+    }
+}